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I have two wzr-600dhp routers. I bought the second router because I needed more wireless coverage as one was in the basement. The other is on the second floor.One is setup as an actual router, the other is setup as an access point. Both are hard wired to the network via ethernet.The access point is connected to the network via one of the LAN ports so both routers are connected to the same subnet. The access point has the WAN port disabled and DHCP turned off of course.

My question is; What is the best or recommended way to setup both routers to optimize wireless signal.At the moment I have it setup like this;